39972794 has 4 divisors (see below), whose sum is σ = 59959194. Its totient is φ = 19986396.

The previous prime is 39972791. The next prime is 39972799. The reversal of 39972794 is 49727993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25050025 + 14922769 = 5005^2 + 3863^2 .

It is not an unprimeable number, because it can be changed into a prime (39972791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9993197 + ... + 9993200.

Almost surely, 2^39972794 is an apocalyptic number.

39972794 is a deficient number, since it is larger than the sum of its proper divisors (19986400).

39972794 is a wasteful number, since it uses less digits than its factorization.

39972794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19986399.

The product of its digits is 857304, while the sum is 50.

The square root of 39972794 is about 6322.4041313412. The cubic root of 39972794 is about 341.9176357406.

The spelling of 39972794 in words is "thirty-nine million, nine hundred seventy-two thousand, seven hundred ninety-four".